JPH0721995Y2 - Stand head angle adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a device for adjusting the angle of the head of a music stand, a microphone stand, a musical instrument stand, or the like.

<Prior art> Conventionally, in order to adjust the angle of the head of a music stand, microphone stand, musical instrument stand, etc. according to the usage condition, a support member for supporting the music rest part, etc., and a mounting member for attaching to the stand Was set to a desired angle, both members were tightened with screws or the like, and both were locked only by the friction of the contact surface between the mounting member and the supporting member.

<Problems to be Solved by the Invention> However, if the both are locked only by the friction between the contact surfaces of the supporting member and the mounting member as in the prior art, the weight of the supporting member is limited.

In other words, in the music stand, if a large amount of music is placed on the music rest mounted on the support member, the music rest will rotate due to the weight of the music, and the music rest will not function as a music stand. It was Further, in order to lock the music sheet placing portion to the mounting member, it is necessary to firmly tighten the screws and the like, and a considerable force is required at the time of tightening and loosening.

Further, since the rotation range of the support member is not regulated at all, when the screw loosens and the support member rotates, the music score placement part also rotates, and the placed music score falls.

This was also the case with microphone stands, musical instrument stands, and the like.

<Means for Solving the Problems> The present invention has been proposed in view of the above, and includes the support member 3 and
It has a mounting member 4 for mounting the supporting member 3 rotatably, and a lock release button 5 for releasing the locking between the supporting member 3 and the mounting member 4, and the supporting member 3 is provided on the back surface of the substrate 6. It has an upright disc-shaped fastening portion 7, and a cylindrical step portion 9 on one end surface.
And a columnar shaft 10 is erected, and a plurality of locking teeth 11 are radially provided on the end face from the outer circumference of the step portion 9 to the outer circumference of the fastening portion 7, and the end surface of the step portion 9 is provided with A first restricting protrusion 12 is provided in a part along the outer periphery, and a fitting recess 13 having a plurality of protrusions 14 on the inner peripheral face is provided on the tip end surface of the shaft 10 described above. The stand mounting portion 16 has an engaging portion 17 provided at one end thereof, and the engaging portion 17 is provided with a shaft hole 19 in which a step receiving portion 20 and a rotation restricting portion 21 are formed. The rotation restricting part 21 includes a rotating part 22 into which the first restricting protrusion 12 fits and rotates, and a first restricting part 23 that prevents the first restricting protrusion 12 from rotating.
The first restricting portion 23 is provided in a part of the rotation restricting portion 21, and a plurality of radial engaging teeth 24 are provided on the end surface on the side of the stepped receiving portion 20. Cylindrical bearing wall on the opposite side
25 is provided, and the notch 26 is provided in a part of the bearing wall 25 to form the second restricting portion 27.
Has a cylindrical shape with one end closed, and a cylindrical step portion 29 and a cylindrical fitting shaft 30 are provided upright on the inner surface of the closed end surface.
A second restricting protrusion 33 is provided in part on the outer periphery of 29, and a plurality of grooves into which the protrusion 14 provided in the fitting recess 13 of the support member 3 is fitted at the tip end side of the fitting shaft 30. 34 ... is provided.

<Operation> In the normal state, the support member is set to the angle desired by the user within the angle regulated by the first regulation means. Then, the supporting member is fixed to the mounting member by the lock release button.

In the housed state, the locking by the lock release button is released, and the support member rotates within the angle regulated by the second regulation means.

<Example> An example of using this angle adjusting device for a music stand will be described below with reference to the drawings.

This angle adjusting device 1 is, as shown in FIGS. 1 and 2,
It comprises a supporting member 3 for mounting the music sheet placing portion 2, a mounting member 4 for mounting the supporting member 3, and a locking release button 5 for unlocking the mounting member 3 and the mounting member 4.

The support member 3 includes a substrate 6 and a fastening portion 7 provided upright from the back surface of the substrate 6.

The board 6 is for mounting the music sheet placing section 2, and has mounting holes 8 at four corners. To mount the music sheet placing section 2 on the board 6, insert the screws into the attachment holes 8 provided at the four corners and screw the screws into the music sheet placing section 2, or insert the rivets into the attachment holes 8. , Attach it to the music rest part 2 by caulking it.

As shown in FIGS. 2 and 3, the fastening portion 7 is composed of a disk-shaped member that stands upright from the substrate 6.

On one end surface of the fastening portion 7, the center is the same as the fastening portion 7,
A columnar step portion 9 is provided upright, and the step portion 9 has a fastening portion 7
A cylindrical shaft 10 is provided upright with the same center.

A plurality of locking teeth 11 are radially provided on the end surface from the outer circumference of the stepped portion 9 to the outer circumference of the fastening portion 7. In addition, the end face of the stepped portion 9 along the outer circumference of the shaft 10 is about a quarter turn (about
The first regulating projection 12 is provided over 90 degrees.

A fitting recess 13 is provided on the tip end surface of the shaft 10 described above.
A plurality of protrusions 14 are provided on the inner peripheral surface of the fitting recess 13.

Further, a screw hole 15 is opened at the center of the fastening portion 7.

As shown in FIGS. 2 and 5, the mounting member 4 includes a stand mounting portion 16 and an engaging portion 17 extending from one end of the stand mounting portion 16.

The stand mounting portion 16 is a tubular member having one end closed, and has a screw hole 18 on its side surface.

A shaft hole 19 is opened in the center of the engaging portion 17, and one side of the shaft hole 19 is expanded to form a step receiving portion 20 having a diameter slightly larger than the step 9 of the mounting member 4. . Further, a rotation restricting portion 21 is provided near the center of the shaft hole 19 from the step receiving portion 20. The rotation restricting portion 21 includes a rotating portion 22 which is fitted with the first restricting protrusion 12 and rotates, and a first restricting portion which prevents the first restricting protrusion 12 from rotating.
It consists of 23. The first restricting portion 23 is provided over about one half of the rotation restricting portion 21 (about 180 degrees).

The end surface on the side of the stepped portion receiving portion 20 extends radially from the outer periphery of the stepped portion receiving portion 20 to the outer periphery of the engaging portion 17 at the same pitch as the locking teeth 11 provided on the fastening portion 7 of the support member 3. A plurality of locking teeth 24 are provided.

The length of the shaft hole 19 described above is the same as the length of the shaft 10 of the support member 3,
It is slightly longer than the sum of the height of the locking teeth 11.

On the other hand, a cylindrical bearing wall is provided on the opposite side of the engaging teeth 24 of the engaging portion 17.
25 are provided, and about one half of this bearing wall 25 (about 165
2), the notch 26 is provided to form the second restricting portion 27.

A cylindrical unlocking button receiving portion 28 is provided outside the bearing wall 25.

As shown in FIG. 4, the unlocking button 5 is a cylindrical member whose one end is closed, and the inner surface of the closed end face has the same center as the unlocking button 5 and a cylindrical step portion 29. The columnar fitting shaft 30 is provided upright on the step portion 29 with the center of the locking release button 5 being the same. The outer diameter of the fitting shaft 30 is slightly smaller than the inner diameter of the fitting recess 13 provided on the shaft 10 of the support member 3. A spring groove 32 is formed on the inner surface of the closed end surface near the side wall 31.

A second regulation protrusion 33 is provided on the outer circumference of the stepped portion 29 for about a quarter (about 90 degrees).

A plurality of grooves 34, into which the protrusions 14 provided in the fitting recess 13 of the support portion 3 are fitted, are provided on the tip end side of the fitting shaft 30 described above. A screw hole 35 is provided at the center of the fitting shaft 30.

The first restricting protrusion 12 and the rotation restricting portion 21 described above rotate so that the substrate 6 of the supporting member 3 can be rotated from a substantially vertical state to a substantially horizontal state. 1
A regulation unit 21 is provided. Further, the second restricting protrusion 33 and the second restricting portion 27 are provided while the substrate 6 of the supporting member 3 is rotated from a state in which the substrate 6 is substantially vertical to a state in which the substrate 6 is slightly horizontal.
The second restricting protrusion 33 is adapted to rotate within the range of the second restricting portion 27. Then, when the substrate 6 of the supporting member 3 is further rotated from a state just before the substrate 6 becomes substantially horizontal, the second restricting protrusion
The reference numeral 33 rotates within the range of the notch 26 until the substrate 6 of the supporting member 3 is substantially vertical with its head down.

In order to mount the support member 3 on the mounting member 4, the first restricting protrusion 12 of the support member 3 is set within the range of the rotating portion 22 provided on the rotation restricting portion 21 of the mounting member 4, and is fixed. Locking groove of part 7
The shaft 10 is inserted into the shaft hole 19 from the 11 side.

On the other hand, on the other end side of the fastening portion 7, a spring is inserted between the bearing wall 25 and the lock release button receiving portion 28, and the second regulating portion of the bearing wall 25 is inserted.
The tip end surface of the second restriction projection 33 of the lock release button 5 is brought into contact with the tip end surface of 27. Then, the groove 34 of the fitting shaft 30 is aligned with the protrusion 14 of the fitting recess 13, and the fitting shaft 30 is fitted into the fitting recess 13.
The screw 37 is inserted into the screw hole 15 of the fastening portion 7 and screwed into the screw hole 35 of the lock release button 5.

To attach the angle adjusting device 1 to the pole 38 of the stand, a screw may be inserted into the screw hole 18 provided in the stand attaching portion 16 and the screw may be tightened.

The angle adjustment of the stand head will be described below.

The support member 3 and the mounting member 4 are elastically contacted by the bias of the spring 36.

Within a range in which the substrate 6 of the support member 3 is rotated from a substantially vertical state to a substantially horizontal state, the first restriction protrusion
The reference numeral 12 is inside the rotation portion 22 of the rotation regulation portion 21. On the other hand, the second restricting protrusion 33 is located within the range of the second restricting portion 27, apart from the end surface of the second restricting portion 27 by a distance slightly larger than the tooth height of the locking teeth 11, 24.

Therefore, within the range described above, the locking teeth 11 of the support portion 3 and the locking teeth 24 of the mounting member 4 are in mesh with each other by the biasing force of the spring 36. (FIG. 6A).

On the other hand, when the lock release button 5 is pushed into the above-described range until the second restriction protrusion 33 contacts the second restriction portion 27, the locking teeth 11 of the support member 3 and the locking teeth 24 of the mounting member 4 mesh with each other. Comes off (Fig. 6B). Therefore, in this state, the first restriction protrusion 12 of the support member 3 can rotate within the rotation part 22 of the rotation restriction part 21 provided on the attachment member 4. Therefore,
When the user sets the support member 3 at a desired angle and releases the restriction release button 5, the locking teeth 11 of the support member 3 and the locking teeth 24 of the mounting member 4 are engaged with each other by the biasing force of the spring 36, and the angle is changed. Can be determined. As described above, the angle setting range of the support member 3 in the normal state is from the state where the support member 3 is substantially vertical to the state where it is substantially horizontal. (FIG. 7A).

On the other hand, when the support member 3 is in a state just before it becomes substantially horizontal, the second restricting protrusion 33 comes out of the range of the second restricting portion 27 and enters the range of the notch 26 (FIG. 7B).

In this state, when the lock release button 5 is pushed in, the first restricting member 23 comes out of the rotation restricting portion 21 (FIG. 6C). Then, when the support member 3 is further rotated, the first
The restriction protrusion 12 is slightly separated from the end surface of the first restriction portion 23, and
It falls within the range of the regulation unit 23. Therefore, in this state, even if the lock release button 5 is released, the lock release button 5 does not return because the first restriction protrusion 12 contacts the first restriction portion 23. Also, the locking teeth 11 of the support member 3 and the locking teeth of the mounting member 4
24 is out of mesh. Therefore, the second regulation protrusion 33
Rotates within the range of the notch 26, and the support member 3 rotates within this range, with the head of the support member 3 facing down.
Can be almost parallel to.

<Effects of the Invention> As described above, according to the present invention, the supporting member, the mounting member for rotatably mounting the supporting member, and the locking release button for releasing the locking between the mounting member and the mounting member. The support member has a disk-shaped fastening portion that is erected on the back surface of the substrate, and a columnar step portion and a columnar shaft are erected on one end surface. A plurality of locking teeth are provided radially on the end surface from the outer circumference to the outer circumference of the fastening portion, and at the end surface of the stepped portion, a first restricting protrusion is provided in part along the outer circumference of the shaft. Is provided with a fitting recess having a plurality of protrusions on the inner peripheral surface thereof, the mounting member has an engaging portion provided at one end of a stand mounting portion, and the engaging portion has a step receiving portion. And a rotation restricting portion are formed in a shaft hole, and the rotation restricting portion includes a rotating portion which is rotated by fitting the first restricting protrusion, and a first restricting portion. The first restricting portion, which is composed of a first restricting portion that prevents the protrusion from rotating, is provided in a part of the rotating restricting portion, and a plurality of radial locking teeth are provided on the end surface of the step receiving portion side. A cylindrical bearing wall is provided on the opposite surface of the engaging portion 17, and a notch is provided in a part of this bearing wall to form a second restricting portion. It has a cylindrical shape with one end closed, and a cylindrical step portion 29 and a cylindrical fitting shaft are provided upright on the inner surface of the closed end surface, and a second restricting protrusion is provided partially on the outer periphery of the step portion. It is characterized in that a plurality of grooves into which the projections provided in the fitting recesses of the support member are fitted are provided on the tip end side of the fitting shaft. Therefore, the supporting member and the mounting member are firmly locked by the engaging teeth engaging with each other, so that the supporting member does not rotate due to the weight of the placed musical score. Also,
Since the engaging teeth are engaged with each other by using the biasing force of the spring instead of tightening with the screws, the engaging teeth can be easily engaged and disengaged. Therefore, the angle adjustment operation becomes very easy. Further, in the regulated rotation state, the music rest portion attached to the base plate of the support member rotates in a range of about 90 degrees from a vertical state to a horizontal state. Even if the support member is rotated due to disengagement, the music sheet placing portion does not rotate further than in the horizontal state, so that the placed music sheet does not drop. In addition, since it can be easily put into the stored state by operating the lock release button, it does not become bulky when carried.

[Brief description of drawings]

The drawings show an embodiment in which the present invention is applied to a music stand. FIG. 1 is a front view of the music stand attached to the music stand, FIG. 2 is an exploded perspective view of FIG. 3, and FIG. 3A is a rear view, FIG. 3B is a side view, FIG. 3C is a bottom view, FIG. 4 is a lock release button, FIG. 4A is a side sectional view, and FIG. 4B is a rear view. FIG. 5 is a mounting member, FIG. 5A is a front view, and FIG. 5B.
Is a rear view, FIG. 5C is a side sectional view, and FIG. 6 is a partially cutaway rear view of a state in which a supporting member and a mounting member are combined.
6A is a locked state, FIG. 6B is a normal rotation state, FIG. 6C is a storage rotation state, FIG. 7A is a sectional view taken along line AA of 6A, and FIG. 7B is FIG. 6C. FIG. In the figure, 1 is an angle adjusting device, 3 is a supporting member, 4 is a mounting member, 5 is an unlocking button, 6 is a base plate, 7 is a fastening part, 9 is a step part, 10 is a shaft, 11 and 24 are engaged. Tooth, 12 is the first regulating protrusion, 13
Is a fitting concave portion, 14 is a protrusion, 16 is a stand mounting portion, 17 is an engaging portion, 19 is a shaft hole, 20 is a step receiving portion, 21 is a rotation restricting portion, 22 is a rotating portion, and 23 is a first portion. The regulating portion, 27 is the second regulating portion, and 33 is the second regulating protrusion.

Claims (1)

[Scope of utility model registration request] 1. A support member 3, a mounting member 4 for rotatably mounting the support member 3, and a lock release button 5 for releasing the lock between the support member 3 and the mounting member 4. The support member 3 has a disc-shaped fastening portion 7 provided upright on the back surface of the substrate 6, and has a cylindrical step portion 9 and a cylindrical shaft on one end surface.
A plurality of locking teeth 11 are provided radially on the end face from the outer periphery of the step portion 9 to the outer periphery of the fastening portion 7, and the end face of the step portion 9 is provided along the outer periphery of the shaft 10 along the outer periphery of the shaft 10. 1st regulating projection 12 is provided on the above portion, and fitting recess 13 having a plurality of projections 14 on the inner peripheral surface is provided on the tip end surface of shaft 10 described above. It has an engaging portion 17 provided at one end, and the engaging portion 17 is provided with a shaft hole 19 in which a step receiving portion 20 and a rotation regulating portion 21 are formed. Is a rotating portion 22 which is fitted with the first regulating projection 12 and rotates.
And a first restricting portion 23 for blocking the rotation of the first restricting protrusion 12 is provided on a part of the rotating restricting portion 21,
A plurality of locking teeth 24 are provided on the end surface on the side of the stepped portion receiving portion 20, and a cylindrical bearing wall 25 is provided on the opposite surface of the engaging portion 17, and a part of this bearing wall 25. The notch 26 is provided in the second regulation portion.
27, the unlocking button 5 has a cylindrical shape with one end closed, and a cylindrical step portion 29 and a cylindrical fitting shaft 30 are erected on the inner surface of the closed end surface. Part of the outer periphery of the stepped portion 29 is a second regulation protrusion.
33 is provided, and on the tip end side of the fitting shaft 30, a plurality of grooves into which the protrusions 14 provided in the fitting recess 13 of the support member 3 are fitted.
An angle adjustment device for the head of the stand, equipped with 34 ...